After Transformation:
Hot Leg Sanji - Awful!!!!!
Asura Zoro - Super!!!!!!!!!
R.P. (Rampaging Chopper) - He can crush the whole building, and beat up the CP9 & Strawhats during Tower of Justice, he kill Kumadori just by several punches. PeopIe believe he has the same power as Oz.
Nightmare + Gear 2 Luffy - Sure the strongest, he can kill Oz easily, sure he will take the others & R.P. easy as the insects. But onIy 3 minutes...

i just make a gap to show their power... the gap is between 1-8... and bcz the strongest is luffy i'll take the gap to all crew's power to luffy's power...
zoro to luffy: 1
nami to luffy: 5
usopp to luffy: 5.5
sanji to luffy: 2
chooper to luffy: 4
robin to luffy: 4
franky to luffy: 3
brooke to luffy: 4 or 5 hmm... how bout 4.5...??

well, i get confused with nami, usopp and brooke...
1. can nami pwn luffy by her weapon? could it'll affect luffy? she's just can make a rain & thunder, and we've seen that thunder or lightning won't affecting luffy's body... in body strength or weapon skill she still be under luffy... so, i give her 5 gap to luffy...
2. usopp, in their battle in water7... luffy's won the battle.. even though at the beginning usopp has take the helm on the battle... he can keep on fighting luffy bcz his good skill on shooting ... but, for body strength he's doesn't even being able to win the battle with luffy only with his punch...
wait... i take it back.. in his body strength... in one piece wikia it's tell that his stamina has limitless... also, he's very intelligence person who can be able to defeat person who's far stronger than him... he can use it to luffy... he know all luffy's weakness so maybe if they re-match again he can win the battle...
3. brooke, skinny... always doing dirty trick to all his opponent... in body strength surely he's not equal to luffy... but, if he's fighting with his sword and use his dirty trick to luffy he can win the battle... or maybe just keep on to luffy...